Methidathion Pickering emulsion in water and preparation method thereof

A technology of difenthion and water emulsion, which is applied in the fields of botanical equipment and methods, insecticides, acaricides, etc., can solve problems such as environmental pollution, achieve high dynamic stability, improve stability, and reduce toxicity Effect

Inactive Publication Date: 2015-04-22
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of flammable and volatile organic solvents in the traditional emulsifiable concentrate preparation, the long-term use of a large amount of organic solvents has caused serious pollution to the environment

Method used

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  • Methidathion Pickering emulsion in water and preparation method thereof
  • Methidathion Pickering emulsion in water and preparation method thereof
  • Methidathion Pickering emulsion in water and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Dissolve 0.1g trimethafos in 1.0g xylene as an organic solvent to make the first phase; (2) Dissolve 5.0g polyethylene glycol 400 (PEG400) and 0.1g propylene glycol in 93.7g water , and place 0.1g SiO 2 (average particle size 5-20nm) dispersed in the aqueous solution, stirred for 5 minutes to form the second phase; (3) the second phase is stirred at 800 rpm, slowly add the first phase to the second phase, continue Stir for 10 minutes, make described thapfos pickerin aqueous emulsion, form uniform and stable aqueous emulsion, and particle size distribution is uniform, mainly distributes in 50nm-300nm, its particle size distribution is as attached figure 1 As shown, the average particle diameter is 106.4nm.

Embodiment 2

[0037] (1) Dissolve 0.15g trimethafos in 1.5g xylene, an organic solvent, to make the first phase; (2) Dissolve 9.0g PEG400, 0.15g propylene glycol in 89.1g water, and 0.1g SiO 2 (average particle size 5-20nm) dispersed in the aqueous solution, stirred for 5 minutes to form the second phase; (3) the second phase is stirred at 900 rpm, slowly add the first phase to the second phase, continue Stir for 20 minutes to make the thapfos pickerin aqueous emulsion. Methapion is well dispersed to form a uniform and stable water emulsion, and the particle size distribution is uniform, mainly distributed in 160nm-800nm, as shown in the attached figure 2 As shown, the average particle size is 460nm.

Embodiment 3

[0039] (1) Dissolve 0.2g trimethafos in 2.0g xylene, an organic solvent, to make the first phase; (2) Dissolve 11.5g PEG400, 0.2g propylene glycol in 85.9g water, and 0.2g SiO 2(average particle size 5-20nm) dispersed in the aqueous solution, stirred for 10 minutes to form the second phase; (3) the second phase is stirred at 1000 rpm, slowly add the first phase to the second phase, continue Stir for 20 minutes to make the thapfos pickerin aqueous emulsion. Methapion is well dispersed to form a uniform and stable water emulsion, and the particle size distribution is uniform, mainly distributed in 200nm-500nm, with an average particle size of 257nm.

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Abstract

The invention discloses a methidathion Pickering emulsion in water, which is prepared by the following raw materials by weight: 0.1-1.0% of methidathion original drug, 1.0-8.0% of organic solvent, 0.05-0.5% of stabilizing agent, 5.0-12.0% of thickening agent, 0.1-0.5% of antifreeze and the balance water, wherein the sum of all components is 100%. The stabilizing agent is silica, clay, kaolin or montmorillonite. The methidathion Pickering emulsion in water utilizes a Pickering emulsion of the methidathion, uses water as a medium, uses SiO2 as a solid stabilizing agent of the emulsion, replaces a lot of poisonous and harmful organic solvents in a traditional methidathion missible oil preparation, and does not need usage of the emulsifier, thereby reducing toxicity, and implementing green and environmental protection.

Description

(1) Technical field [0001] The invention relates to a fosfospicrin aqueous emulsion and a preparation method thereof. (2) Background technology [0002] Methaphos, chemical name: S-2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl-0,0-dimethyl Phosphorodithioate, common name in English: Methidathion, CAS number: 950-37-8, molecular formula: C 6 h 11 N 2 o 4 P.S. 3 , molecular weight: 302.32, the structural formula is as follows: [0003] [0004] Methapon is a broad-spectrum organophosphorus insecticide with high activity and rapid drug effect. It is resistant to rain erosion after spraying. It has contact killing, stomach poisoning and osmotic effects, and can penetrate into plant tissues. Suction mouthparts pests have killing effect, especially have special effect on scale insects, and have a certain control effect on mites. It is suitable for controlling various pests on fruit trees, cotton, tea trees, vegetables and other crops. It is suitable for pests ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N57/16A01N25/04A01P7/02A01P7/04
Inventor 吴华悦高文霞陈久喜刘妙昌黄小波池艳艳金杰
Owner WENZHOU UNIV
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